Film splicing device



May 6, 1941. B. s'n-:cHBART FILM SPLICING DEVICE Filed April 7, 1957 2 sheets-sheet 1 NTEIR J0# ATTY.

INVE BRUNE ETEEHEAHT EYQ/ May 6, 14941.

B. STECHBART FILM SPLCING DEVICE Filed April '7, 1937 2 Sheets-Sheei 2 f device, particularly with a convenience in use, and economy of manufacture.

Patented May 6, 1941 2,241,224 OFFICE FILM SPLIOING DEVICE man stechbm. chicago, nl., assignmto The Bell & Howell Company,

poration ot Illinois Chicago, Ill., a cor- Appllcation April 7, 1937, Serial N. 135,520

' 3 Claims. My invention relates particularly to motion picture film splicers although not limited to this use alone.

The general object of the invention resides in the provision of a novel and practical film splicing view toward accuracy.

With this object in view my invention con sists in certain features of novelty inthe construction, combination and arrangement of parts by which the said object and certain other'objects, hereinafter appearing, are effected, all as fully described with reference to the accompanying drawings and more particularly pointed out in the appended claims.

In the said drawings- Figure 1 is a top plan view of a splicing device embodying my invention;

Figure 2 is a side elevation ofthe same;

Figure 3 is a front elevation of the same;

Figures 4 and 5 are partial sections substantially on the line 4-4 of Figure 1 and showing parts in different positions;

Figure 6 is a partial section substantially on the line 6--5 of Figure 2;

Figure 7 is a sectional View substantially on the line 1 1 of Figure 6 with parts removed;

Figure 8 is a perspective view of the axle member of the device, hereinafter described;

Figures 9, 10, 11 and 12 are perspective views of theseveral film clamping and shearing members of the device, hereinafter described; and

Figure 13 is a section substantially on the line I 3-I 3 of Figure 2.

Referring to the drawings, I designates a base which is preferably formed of wood. A film clamping member 2', see particularly Figure 9, is formedl of iat or sheet metal stock and involves a lm clamping portion 3. a pivot portion 4 bent at a right angle to the clamping portion 3,

, and a support portion 5 also bent at aright angle `to the clamping portion 3 and, as shown, forming an extension of the pivot portion 4.

The support portion 5 is provided with apertured lugs 6 bent therefrom in parallelism with the `clamping portion 3. and headed screws 1, passing through the apertures of the lugs 6 and screwthreaded into the lbase I, serve to secure the clamping member 2 on the base with the clamping portion V3 elevated above the base.

A second nlm clamping member 8 is formed of fiat or sheet metal stock and involves a film clamping portion 9 and a pivot portion I I bent at a right angle to the clamping portion 9. See particularly Figure 10.

A third lm clamping member I2 is formed of A fourth film clamping member I5 is formed of at or sheet metal stock and involves a iilm clamping portion I6 and a pivot portion I1 bent at a right angle to the clamping portion I6. See particularlyFigure 12.

Pivot mounting means is associated with the pivot portions 4, II, I4 and I1 of the clamping members, whereby the clamping members are relatively movable, and consists as follows.

An axle member I8 extends through apertures I9, 2|, 22 and 23 in the pivot portions 4, I I, I4 and I1 of the clamping members, and is provided with a circumferential thrust` bearing flange 24. See

at or sheet metal stock and involves a iilm clamping portion I3 and a pivot at a right angle to the clamping particularly Figure 1l.

portion I4 bent portion I3. See

particularly Figures A thrust bearing 6 to 12 inclusive.

member 25 is screwthreaded in an axial, bore 26 extending partially through the axle member IB and is provided with an opposing circumferential thrust bear'ing flange 21, the flanges '24 and 21 axially confining the aforesaid pivot portions of the clamping members and a spring bearing washer 28 interposed between the ange 21 and the pivot portion Il. A set screw 29 is screwthreaded through an axial bore 3| of the thrustbearing member 25 and engages the bottom of the bore 26 to lock the member 25 in axially adjusted position with reference to the axle member I8 foreecting a thrust bearing adjustment of the aforesaid pivot mounting means. See Figures 6, 7 and 8.

The clamping member 2 forms a support for the other clamping members and the pivot mounting means above described, and the axle member I8 is provided with a keyway 32 which is engaged by an integral key 33 of the clamping member 2- for angularly flxing this clamping member and the axle member. The bearing washer 28 is also angularly xed with the axle member by reason of diametrically opposite integral keys 34 thereof engaging a diametrical end slot 35 of the axle member.

The clamping members 2, 8, I2 and I5 are, as described, relatively movable angularly and comprise in addition shearing. members and function similarly to those described and claimed in U. S. Patent No. 1,275,431, for Splicing apparatus for cinematographic films, issued on application of Albert S. Howell, and accordingly but a brief description is necessitated herein.

The clamping members 2 and 8 coact to clamp one lm portion 36, and the clamping members I2 and I5 coact to clamp another'lm portion 31, the clamping members 2 and I 2 being provided with lm perforation engaging teeth 38 for 'accurately locating the lm portions and the clamping members 8 and I5 being provided with apertures 39 into which the teeth 38 project when the pairs of clamping members arek in clamping relation.

'I'he opposing edges ofthe pairs of clamping members are offset to the end that the clarnping member I5 overlaps the clamping member 2 for clamping correspondingly overlapping ends of the film portions 38 and 81 in overlying relation for the cementing of the nlm ends, as illustrated in Figure 5, and, to the end of shearing the film ends, the aforesaid opposing edges of the clamping members are provided with shearing edges. These shearing edgescomprise a shearing edge 4I on the clamping member 2 which involves an opening 42 in the support portion 5 of this member, an opposing shearing edge 43 on the member I2 l`cooperating with the shearing edge 4I, a shearing edge 44 on the member 8, and a shearing edge 45 on the member I5 opposing the shearing edge 44.

In order to diminish the power necessary to shear the nlm ends, the members 8 and I2 are milled, as designated at 46, to increase the angularity of shearing action with reference to the pivotal axis of the clamping members.

The aforesaid pivotal mounting means of the clamping members includes axial thrust bearing means, and in order to prevent separation of the clamping members in the planes of their clamping portions, additional thrust bearing means is provided which is operative between the clamping members and which is disposed radially remote from the pivot mounting means and, as shown, opposite thereto with reference to the film clamping region of the clamping mem- Y free end with a lug 41 bent portion thereof. spaced relation on the support portion 5 remote from the aforesaid pivot mounting means by means of intermediately enlarged 4and shouldered rivets 49. See Figures 2, 9, 11 and 13. .-'Ihe lug 41 engages between the support portion 5 and the lug 48 when the clamping membersl2 and I2 are in shearing and substantially alined relation, as shown in Figures 4 and 5, to form a thrust bearing between these clamping members disposed radially remote from the aforesaid pivot mounting means, thus prevent lateral separating movement of these clamping members.

The clamping member 2 is provided at the end thereof radially remote` from the aforesaid pivot mounting means with a lug 5I bent at a right4 angle upwardly from the outer side edge of the clamping portion thereof, and this lug is engaged by the outer side edge of the clamping portion member 8 when the clamping members 2 and 8 are in clamping relation to oppose lateral movement of the clamping member 8 in the plane of its clamping portion away from the clamping members I2 and I5.

The clamping member I2 is provided at the end thereof radially remote from the aforesaid pivot mounting means with a lug 52 bent at a right angle upwardly of the clamping portion thereof, and this lug is engaged by the outer side edge of the clamping portion of the clamping member I5 when the clamping members I2 and I6 are in clamping relation to oppose movement of .the clamping member. I5 inthe plane of its clamping portion away from the clamping members 2 and 8.

-The clamping members 8 and I5 are provided at the ends thereof radially remote from the aforesaid pivot mounting means with lugs 53 bent lat right angles upwardly from the inner side edges of the clamping portions thereof, and these from the outer side edge lugs are adapted to engage in the region of alinement of the planes of the clamping portions thereof to afford thrust bearing opposition to the lugs 41, 48, 5I and 52.

To the end of securing the overlapping lm ends for the setting of the cement applied thereto. a locking member 54 is pivoted on the intermediate portion of one of the rivets 49 and is provided with a cam locking portion 55 which engages the free end of the clamping member I5 to releasably lock all of the clamping members in splice clamping relation for the setting of the splicing cement, as in Figure 5.

To the end of facilitating operation of the device, a cement container 56 is mounted on the base I, and anemulsion scraper 5l is removably seated on the base I for scraping the photographic emulsion from one of the film ends preparatory to the iinal splicing operation.

Having thus described my invention, wish to be limited to the precise details described as changes may be readily made without departing from the spirit of my invention, but having thus described my invention, I claim as new and desire to secure by Letters Patent the following:

1. In a film splicing device, the combination with a plurality of film engaging members, of pivot mounting means whereby sai-d engaging members are relatively movable, said mounting means comprising an axle member extending through apertures in said engaging members and provided with a circumferential thrust bearing flange, a thrust bearing member screwthreaded in an axial bore extending partially through said axle member and provided with an opposing circumferential thrust bearing flange, and a set screw screwthreaded through an axial bore of said thrust bearing member and engaging the bottom of said rst mentioned axial bore to lock said thrust bearing member in axially adjusted position.

2. In a film splicing device, the combination with a plurality of film engaging members one of which forms a supporting member, of pivot mounting means whereby said engaging members are relatively movable, said mounting means comprising an axle member extending through apertures in said eng-aging members and provided with a circumferential thrust bearing flange, a thrust bearing member mounted in an axial bore of said axle member and provided with an opposing circumferential thrust bearing ange, and a slide key engagement between said supporting member and said axle member and angularly fixing the same.

I do not 3. In afilm splicing device, the combination A with a plurality of lm engaging members one of which forms a supporting membe of pivot mounting means wherebyv said engaging members are relatively movable, said mounting means comprising an axle member extending through apertures inY said engaging members and provided with a circumferential thrust bearing flange, -a thrust bearing member mounted in an axial bore of said axle member and provided with an opposing circumferential thrust bearing flange, means for adjustably positioning said thrust bearing member axially of said axle member, and a slide key engagement between said supporting member and said axle member and a'ngularly fixing the same.

BRUNO STECHBART. 

